The work is________ smoothly. I’m sure it will be finished in a month or so.

The work is________ smoothly. I’m sure it will be finished in a month or so.

A.progressing

B.improving

C.moving

D.keeping

答案及解析： A

解析：

progress作动词为不及物动词，BCD项为及物动词，应用被动语态，用其过去分词。